Adam and his family are planning a trip to Alaska in either June or December. During the summer months in the Northern Hemisphere, the weather is typically warmer and the days are longer. During the winter months in the Northern Hemisphere, the weather is typically cooler and the days are shorter. Adam’s family decides to travel in June based on this information. Why does Earth have seasons?

Which of the following observations indicates that an atom has neutrons? some uncharged particles are scattered by a beryllium atom when it hits a gold foil. some uncharged particles bounce back from a gold foil when it is bombarded with alpha particles. a radiation consisting of uncharged particles is emitted when alpha particles strike beryllium atoms. a radiation which attracts electrons is produced when a beryllium atom is bombarded with alpha particles.